True demon

After Kali raged, the corruptive power that sourced from 'rage' allowed her to suddenly have the power to break through the God Slaughtering Formation. However, it had turned her from a holy pixie into a fallen pixie.

And at this moment in time, Shi Xiaobai had used his superpower, 'Power Siphoning', to forcefully snatch the corruptive power from Kali. As a result, this power was also sucked into his body.

As such, Kali's hair returned to the purple color she loved. With the corruptive power disappearing completely, she had transformed back into a holy pixie.

As for Shi Xiaobai, his hair had become the silverish-white color that was an emblem of fallen pixies.

The silver color was shiny, as though beautiful flowing clouds or water.

The silver hair suddenly added a sinister handsomeness to the delicate-looking Shi Xiaobai.

If this were purely a result of dyeing his hair, it would undoubtedly make him look suave.